var createError = require('http-errors');
var express = require('express');
var path = require('path');
var cookieParser = require('cookie-parser');
var logger = require('morgan');

//连接数据库
require('./util/database');
//引入token验证插件配置文件
var jwtAuth = require('./util/auth.config.js');
var logregRouter = require('./routes/logreg');
var exercisesRouter = require('./routes/exercises');
var testingRouter = require('./routes/testing');
var authRouter = require('./routes/auth');

var collectionsRouter = require('./routes/collections');
var errorsRouter = require('./routes/errors');
var studentsRouter = require("./routes/students");
var uploadRouter = require("./routes/uploadImage");
var typesRouter = require("./routes/types");
var testsRouter = require("./routes/tests");
var testedsRouter = require("./routes/testeds")


var app = express();


// 设置 CORS 允许跨域
var allowCrossDomain = function (req, res, next) {
  // 设置允许哪一个源（域）可以进行跨域访问，* 表示所有源
  res.header("Access-Control-Allow-Origin", "*");
  // 设置允许跨域访问的请求头
  res.header("Access-Control-Allow-Headers", "X-Requested-With,Origin,Content-Type,Accept,Authorization");
  // 设置允许跨域访问的请求类型
  res.header("Access-Control-Allow-Methods", "PUT,POST,GET,DELETE");
  // 设置允许 cookie 发送到服务器 
  res.header('Access-Control-Allow-Credentials', 'true');
  next();
};
app.use(allowCrossDomain); // 运用



// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'jade');

app.use(logger('dev'));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));
//使用配置，需在路由之前使用
app.use(jwtAuth);

app.use('/collections', collectionsRouter);
app.use('/errors',errorsRouter)
app.use("/students", studentsRouter);
app.use('/uploadImage', uploadRouter);
app.use('/types',typesRouter);
app.use('/tests',testsRouter);
app.use('/testeds',testedsRouter);


app.use('/logreg', logregRouter);
app.use('/exercises', exercisesRouter);
app.use('/testing', testingRouter);
app.use('/auth', authRouter);

// catch 404 and forward to error handler
app.use(function(req, res, next) {
  next(createError(404));
});

// error handler
app.use(function(err, req, res, next) {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get('env') === 'development' ? err : {};

  // render the error page
  res.status(err.status || 500);
  res.render('error');
});

app.listen(3000,function(){
  console.log("服务器已连接,3000");
})
